The pregnancy test stick has a very deep line (about the use and interpretation of the pregnancy test stick) 1. How to use the pregnancy test stick The pregnancy test stick is a tool for measuring pregnancy. Its main principle is to detect the concentration of chorionic gonadotropin (hCG) in urine. If the concentration is higher than a certain value, it means that the woman is pregnant. When using a pregnancy test stick, you need to pay attention to the following aspects. First, choose the right time. A woman\’s ovulation period is usually around the 14th day of the menstrual cycle, and an assessment needs to be carried out at this time. Secondly